diff options
| author | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-12-17 11:28:02 +0000 |
|---|---|---|
| committer | Mark Kettenis <kettenis@cvs.openbsd.org> | 2015-12-17 11:28:02 +0000 |
| commit | 5d081ca74f2ed9c28890dd668d1ac1e827540496 (patch) | |
| tree | d5f8afe51618fdd686f9e5e5de5f9b266ef38c45 /gnu | |
| parent | 0d7c89a48a1daf972dd8aaaa7794b31b9f64331d (diff) | |
Implement a memory barrier for mips. Basically this makes __sync_synchronize()
emit a "sync" instruction.
ok visa@
Diffstat (limited to 'gnu')
| -rw-r--r-- | gnu/gcc/gcc/config/mips/mips.md | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/gnu/gcc/gcc/config/mips/mips.md b/gnu/gcc/gcc/config/mips/mips.md index 969d22fa00f..c20219e81f4 100644 --- a/gnu/gcc/gcc/config/mips/mips.md +++ b/gnu/gcc/gcc/config/mips/mips.md @@ -47,6 +47,7 @@ (UNSPEC_MFHILO 26) (UNSPEC_TLS_LDM 27) (UNSPEC_TLS_GET_TP 28) + (UNSPEC_SYNC 29) (UNSPEC_ADDRESS_FIRST 100) @@ -5483,3 +5484,18 @@ ; The MIPS DSP Instructions. (include "mips-dsp.md") + +(define_expand "memory_barrier" + [(set (mem:BLK (match_dup 0)) + (unspec:BLK [(mem:BLK (match_dup 0))] UNSPEC_SYNC))] + "" +{ + operands[0] = gen_rtx_MEM (BLKmode, gen_rtx_SCRATCH (Pmode)); + MEM_VOLATILE_P (operands[0]) = 1; +}) + +(define_insn "*sync_internal" + [(set (match_operand:BLK 0 "" "") + (unspec:BLK [(match_operand:BLK 1 "" "")] UNSPEC_SYNC))] + "" + "sync") |